1991 Pontiac Firebird V8 Two Wheel Drive Automatic 106K miles
i recently did a tune up on my 91' firebird 305 tbi. I decided to reset the base timing. The base timing was 6 deg. Btdc. I've had pinging probs before but this time I thought it was alright. The engine would not stop pinging until base timing was about 1 degree btdc! Now i'm dealing with a serious lack of power. I also noticed that after I reconnected the EST and checked timing again, it was so far adv. It was about an inch and a half away from the marker plate. I checked for vacuum leaks, I have recently replaced the dist and ICM, I dont have any lean mix issues that I know of. Any suggestions?
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Tuesday, April 14th, 2009 AT 5:26 PM
